Intro
D G D G
e--10-10---------------------------------10-10-------------5-6-5------
B--10-12----------------3-4-----5-6-5----10-12-------------6-6-6---5-6
G--10-12----------------3-3-----5-5-5----10-12-------------5-5-5---5-5
D--12-12----------------3-3-----5-5-5----12-12---------------------5-5
A--12-10---------------------------------12-10------------------------
E--10-10-0x-0x-0x-0x-0x------0x-------0x-10-10-0x-0x-0x-0x-------0x---
Play this 3 times after top part
[ Tab from: https://www.guitartabs.cc/tabs/v/van_halen/unchained_tab_ver_4.html ]
D G D G
e-------10-10-------------------------------10-10-------------5-6-5---
B-------10-12-------------3-4-3----5-6-5----10-12-------------6-6-6---
G-------10-12-------------3-3-3----5-5-5----10-12-------------5-5-5---
D-------12-12-------------3-3-3----5-5-5----12-12---------------------
A-------12-10-------------------------------12-10---------------------
E-0x-0x-10-10-0x-0x-0x-0x-------0x-------0x-10-10-0x-0x-0x-0x-------0x
e-----------
B-5-6-5-----
G-5-5-5-----
D-5-5-5-----
A-----------
E-------0x--